Definitely an interesting read - lots of info!
Magnetic recording: the first 100 years:
http://books.google.com/books?id=7W...he first 100 years&pg=PP1#v=onepage&q&f=false
Magnetic recording: the first 100 years:
http://books.google.com/books?id=7W...he first 100 years&pg=PP1#v=onepage&q&f=false